Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in /var/www/html/extensions/MobileFrontend/tests/phpunit/integration/specials/MobileSpecialPageTest.php:9 Stack trace: #0 {main} thrown in /var/www/html/extensions/MobileFrontend/tests/phpunit/integration/specials/MobileSpecialPageTest.php on line 9